Keystones — Lintel
Five GCSE retrieval questions · 11 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
2000000
Answer: 2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 38°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 50, 34, 36, 5, 38, 36, 35
Answer: 33.4